From f2b5d52d65ce1c6d36a223f4c5a53b9dc3749238 Mon Sep 17 00:00:00 2001
From: Kirill Romanov <djaler1@gmail.com>
Date: Wed, 29 Jun 2022 08:18:21 +0300
Subject: [PATCH] fix: check if component unmounted in Wrapper.exists() (#1629)

* fix: check if component unmounted in Wrapper.exists()

* chore(exists): move exists check to VueWrapper

Co-authored-by: Illya Klymov <xanf@xanf.me>
---
 src/vueWrapper.ts    |  4 ++++
 tests/exists.spec.ts | 27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/src/vueWrapper.ts b/src/vueWrapper.ts
index 46090ea05..6cc96473c 100644
--- a/src/vueWrapper.ts
+++ b/src/vueWrapper.ts
@@ -107,6 +107,10 @@ export class VueWrapper<
     return this.vm.$
   }
 
+  exists() {
+    return !this.getCurrentComponent().isUnmounted
+  }
+
   findAll<K extends keyof HTMLElementTagNameMap>(
     selector: K
   ): DOMWrapper<HTMLElementTagNameMap[K]>[]
diff --git a/tests/exists.spec.ts b/tests/exists.spec.ts
index e53483190..c26be1799 100644
--- a/tests/exists.spec.ts
+++ b/tests/exists.spec.ts
@@ -22,4 +22,31 @@ describe('exists', () => {
     const wrapper = mount(Component)
     expect(wrapper.find('#msg').exists()).toBe(true)
   })
+
+  it('returns false when component destroyed', async () => {
+    const ChildComponent = defineComponent({
+      render() {
+        return h('div')
+      }
+    })
+    const Component = defineComponent({
+      props: {
+        hide: {
+          type: Boolean,
+          default: false
+        }
+      },
+      render() {
+        if (this.hide) {
+          return h('div')
+        } else {
+          return h(ChildComponent)
+        }
+      }
+    })
+    const wrapper = mount(Component)
+    const child = wrapper.findComponent(ChildComponent)
+    await wrapper.setProps({ hide: true })
+    expect(child.exists()).toBe(false)
+  })
 })